Here is a lawsuit Rickenbacker bridge (with saddle and mute) metal treble pickup cover and four knobs. The knobs are 2 "Bass Volume", 1 "Bass Tone" and 1 "Treble Tone". The knobs are push on for knurled shaft pots. They do not have a set screw. They are NOT genuine Rickenbacker parts. I am not sure if they are Ibanez, Greco or Electra.